Researchers from universities in Canada recently conducted two experiments, which were published in Archives of Sexual Behavior, to determine the link between physiological features and sexual conduct and other behaviors.

In the first examination, they assessed 145 heterosexual men in undergraduate school by measuring their faces and FWHR, the width of the face divided by the height of the upper face.

In the second study, they analyzed 314 college men and women, taking the same measurements and adding a few more variables to the questionnaire, such as sexual orientation, chances of infidelity and sociosexual orientation, which evaluates an individual’s perception of casual sex.

“The present research was the first to link the human FWHR to sex drive,” the study read. “Results provide novel insight into FWHR as a morphological predictor of men’s sociosexuality and infidelity intentions.”

While scientists noted that their research only included young adults, the authors believe their findings “extend the field’s understanding of FWHR as a morphological index of psychology and behavior.”